ButtonPic JS is a free Chrome add-on developed by alex3aguiar. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools. This add-on allows users to easily convert a YouTube video into a resizable window, providing a convenient way to watch videos while multitasking.

With ButtonPic JS, users can simply click on the button provided on the YouTube video page, and the video will be detached from the main browser window and displayed in a separate window. This window can then be resized, moved, and positioned according to the user's preference. This feature is especially useful for users who want to continue watching a video while working on other tasks or browsing different websites.

The add-on is easy to install and use, making it accessible to users of all levels of technical expertise. It enhances the user experience by providing a seamless way to enjoy YouTube videos while maintaining productivity. ButtonPic JS is a valuable tool for Chrome users who frequently watch videos on YouTube and want the flexibility to view them in a separate window.